Cows produce milk to feed their babies - just like humans. It flows for the best part of a year and then stops. More milk requires more babies. That's the reality of dairy farming - the visible, obvious side of the industry. But there is another, cruel, much darker side to dairy which few see much and even fewer know about.

The Captive Bolt Pistol does not cause instant death. It is a method of stunning that -- if used correctly -- stuns the animal, so that the heart carries on pumping after they have had their throats cut. However, this can and does fail -- leaving some animals fully or semi﻿ conscious and in pain whilst they are bleeding to death.

Each year, around 18 million turkeys are slaughtered in the UK – with around 10 million killed for the Christmas market alone. The vast majority of them spend their short lives in vast industrial sheds and never go outside.

The reality of the death of millions of ducks heading towards Britain's supermarket shelves under the RSPCA's Freedom Foods scheme was exposed by the first undercover investigation into the slaughter of Britain's favourite bird.